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@nimh taies attnt- Qffira Letters Patent No. 74,885, elated .February 25, 1868.

` IMPROVEMENT IN P LOUGHS.

filly.; Stimme refmx tu im that ett'ers gnteut mit making tart nf the sums.

T0 WHOM IT MAY OONCERN Be it known that I, JEREMY BRADLEY, of Owatonna, in the county of Steele, and State of Minnesotafha've invented a. new and valuable Improvement in Plougbs; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being,` had to the annexed drawings, making a. part of this specification, and to the letters and Egures of referen'ce marked thereon.

The nature of my invention consists in providing an extra plough, with means of attachment, so arranged and constructed that said plough may be easily attached to thc plough-beam of an ordinary plough, in the rear thereof, and thereby enable the operator to make a subsoil-plough of a common plough at pleasure.

My plough-'attachment is constructed in the form shown on the'drawings, in which letter A is the plough,

letter B is the standard, and letter C is'the clamp by which said standard is attached to the plough-beam..

I usually prefer to use a plough made in the form of a. shovel for this attachment, but the shape is not very material. l i

The standard is bent, as shown on Figure 2, to provide for adjlisting the plough direetlyunder and parallel with the plough-beam.

The clamp C is'constructed as shown on the drawings, .and `is attached to the plough-beam by the use'of nuts and screws, to enable me to clasp the plough-beam with great firmness, and thereby hold the standard securely in the proper position. Y

What I clain as my invention, and desire to secure by Letters Patent, s

The combination andarrangementv of the plough A, standard B, and claspV C, in the manner and for the purposes herein specified;

' JEREMY BRADLEY.V

Witnesses C. H. SHAW, WM. H. KELLY. 

